CN201749271U - LED (light-emitting diode) backlighting ultra-bright liquid crystal display (LCD) screen - Google Patents
LED (light-emitting diode) backlighting ultra-bright liquid crystal display (LCD) screen Download PDFInfo
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- CN201749271U CN201749271U CN201020192939XU CN201020192939U CN201749271U CN 201749271 U CN201749271 U CN 201749271U CN 201020192939X U CN201020192939X U CN 201020192939XU CN 201020192939 U CN201020192939 U CN 201020192939U CN 201749271 U CN201749271 U CN 201749271U
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- wall scroll
- emitting diode
- light emitting
- led
- liquid crystal
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Abstract
The utility model discloses an LED (light-emitting diode) backlighting ultra-bright liquid crystal display (LCD) screen. The LCD screen comprises an LCD panel, a light guide plate, a backlighting back iron frame, and a single strip with a plurality of embedded high-brightness LEDs; the LEDs are directly embedded in a substrate of the single strip and integrally encapsulated on the single strip, thereby saving the traditional process of welding the LEDs on the substrate; the single strip closely stuck to the backlighting back iron frame is screwed on the backlighting back iron frame through high-performance heat-conduction silica gel and positioning holes formed on the substrate; and the high-performance heat-conduction silica gel is in contact with the LEDs. The high-brightness LEDs are connected in series, so as to achieve the best matching of reliability; and the LEDs at the inner part of the single strip adopts a gypsophila structure, so that the brightness of the LCD screen is more uniform. The LCD screen has novel structure; and by virtue of the embedded LED design and the high-performance heat-conduction silica gel in contact with the LEDs, the LCD screen has stronger heat dissipation function, and more uniform and higher brightness.
Description
Technical field
The utility model relates to the liquid crystal screen back light source technical field, particularly a kind of LED-backlit LCDs of super brightness.
Background technology
In the 21st century of low-carbon (LC) and environmental protection, light emitting diode replaces cold-cathode tube as light source, and the efficient that makes electricity change light significantly improves, the reduction of heat radiation, and the mercury content of product light source is from having to nothing.In the liquid crystal screen back light source product, the photoelectricity effect and the utilization rate of electrical of product cause direct influence to end product.Along with liquid crystal display is more and more universal, more and more higher to the brightness and the brightness uniformity requirement of module, present LCDs all is difficult to reach the display effect of super brightness.
By on China and foreign patent board web, retrieving following four patents that relate to liquid crystal display and backlight technological improvement:
Patent one: the Chinese patent publication number is that the utility model patent of CN101169553 discloses a kind of middle large scale visible area size liquid crystal screen backlight product, it comprises that light source position reaches and the relativeness of luminous zone, principal feature is that the level of light source primary optical axis and luminous zone is an angle, and the scope of angle is between 20～60 degree; Its light source arrangement is special, and along with the minimizing of quantity of light source, has reduced the consumption to earth non-renewable energy resources, has saved the energy, uses light emitting diode to replace cold-cathode tube as light source.
Patent two: the Chinese patent publication number is that the utility model patent of CN201116710 discloses a kind of liquid crystal screen backlight product that is provided with radiator structure, comprise light source and luminous zone, principal feature is, heat is scattered and disappeared away rapidly by chase under heat conduction aluminium and the product, heat energy is greatly reduced the influence of product.
Patent three: U.S. Patent Publication No. is 10/988, and the patent of 334c has realized with side mode backlight, by the special heat radiation substrate of design on light emitting diode, reaches highdensity light emitting diode integration mode.
Patent four: U.S. Patent Publication No. be 10/917,383 patent by to the light emission direction reality of single light emitting diode and the arrangement design of substrate, realized the uniformity of luminance and the simple integrated technique of direct-type backlight.
Above-mentioned four patents all do not have and have following shortcoming respectively: patent one because the restriction of position, cannot high density realize the arrangement of light emitting diode with patent two, therefore can't realize high brightness; Patent three even realized the high density LED encapsulation of unit substrate, but because lateralarea is limited, can't reach the display effect of high brightness owing to adopted survey backlight.Patent four, the size of its single light emitting diode is bigger than normal, cannot place a large amount of described light emitting diodes in whole viewing area, and design is complicated, and cost improves greatly.Therefore, prior art also can't realize the LED display effect of super brightness.
The utility model content
In order to overcome the defective that above-mentioned prior art exists, the utility model provides a kind of direct-light type LED backlight superhigh-brightness liquid crystal display screen, take the design and the rational radiating mode of straight-down negative LED backlight, make the brightness of LCDs reach super bright standard, can be implemented in good display effect under the various complicated optical environment such as sunlight direct projection, walkway displaying.
To achieve these goals, the technical solution of the utility model is as follows:
A kind of LED-backlit superhigh-brightness liquid crystal display screen, comprise placing display panels, back chase backlight, light guide plate, closely pasting and encapsulate the wall scroll of many light emitting diodes mutually that the light beam that light emitting diode sends on the wall scroll projects on the described display panels through described light guide plate with described back chase backlight.
Be characterized in, described light emitting diode is arranged to direct LED backlight, it be the bottom of LCDs send white the divergence form light beam on described light guide plate, light guide plate becomes the divergence form refraction of optical beam on the described display panels of projecting of the equal light state of area source.
Further, because above-mentioned light emitting diode is a direct-type backlight, its light beam that sends is that a covering of the fan projects on the light guide plate, regulate the homogenising that distance between described light guide plate and the light emitting diode realizes light according to actual conditions, the distance of light guide plate and light emitting diode is traditionally arranged to be 10-20mm, makes the brightness of LCDs higher.
Described light guide plate possesses good astigmatism and light transmission features, and the uniformity coefficient that guarantees light is more than 85%; What the design of described light emitting diode single internal was adopted is the babysbreath structure, realizes that to greatest extent the light that shines on the light guide plate can scatter on the display panels equably, thereby realizes uniform display effect.
Many light emitting diodes connect by series-parallel mode, then integral body are directly embedded on the substrate of wall scroll, so just be packaged on the wall scroll-be the embedded packaged type of Chip on Board, saved the process that traditional LED is welded to substrate;
Weld together in series-parallel mode by high temperature wire between the wall scroll of described embedding light emitting diode and the wall scroll, wherein, the high temperature wire of avoiding welding blocks the light path of described light emitting diode.
Further, offer pilot hole on the substrate of described wall scroll, adopt screw and described wall scroll is screwed on the back chase backlight by described pilot hole, then with heat conductive silica gel with both tight bond.
Place a large amount of high-performance heat conduction bars behind the described back chase backlight, the light emitting diode that embeds on described high-performance heat conduction bar and the wall scroll contacts, make its contact area maximization during installation, the most of heat that sends during light emitting diode work conducts by described a large amount of high-performance heat conduction bar, the area of dissipation of LCDs is improved about 20-30 times, improved radiating efficiency greatly, light emitting diode also is difficult for being burnt out, and has prolonged its serviceable life.
Further, described light emitting diode wall scroll is realized with extraneous being connected by the pad that is arranged on the wall scroll both sides, realizes by the wall scroll on welding high temperature wire and next door and the power supply of outside;
The power supply of the utility model outside relies on constant-current supply to realize, by the series-parallel calculating to light emitting diode connection in series-parallel and wall scroll, calculates and drives needed electric current of entire module and voltage, and the mode by constant current drives.
The beneficial effects of the utility model are, ultra-high brightness LED demonstration backlight, and heat sinking function is strong, and no fan design reduces noise and energy consumption, no mercury pollution, energy-conserving and environment-protective.
Use the light emitting diode of the embedded packaged type of up-to-date COB (Chip on Board) first, thermal diffusivity, inheritance is better, and the life-span is long, the reliability height.
Description of drawings
Fig. 1 is the wall scroll structural representation of embedded encapsulation LED.
Fig. 2 is the enlarged diagram of the solid brilliant pad unitized construction among Fig. 1.
Fig. 3 is the enlarged diagram of the embedded light emitting diode among Fig. 2.
Among the figure, 01, solid brilliant pad, 02, solid brilliant pad, 1, solid brilliant pad, 11, sheet metal, 12, white oil silk-screen ring; 2, wall scroll, 21, substrate, 22, pilot hole, 3, the preparation line of cut, 4, preparation cutting back pad, 5, light emitting diode, 6, high temperature wire.
Embodiment:
Be easy to understand understanding in order to make creation characteristic of the present utility model, technological means and to reach purpose, further set forth the utility model below in conjunction with specific embodiment.
Embodiment:
Referring to Fig. 1, a kind of direct-light type LED backlight superhigh-brightness liquid crystal display screen mainly comprises liquid crystal display display panel, light guide plate, the wall scroll 2 and back chase backlight of light emitting diode is set.
Described display panels, light guide plate and back chase position and structure and the existing very big difference that there is no backlight, be characterized in, described wall scroll 2 adopts many light emitting diodes of embedded encapsulation, a plurality of wall scrolls 2 adopt forms direct-light-type backlight in series-parallel mode, and the divergence form light beam that sends white from the bottom backlight of liquid crystal display is on described light guide plate.
Many light emitting diodes 5 are to connect in the mode of connecting, the both sides of described many light emitting diodes 5 are provided with sheet metal 11, by high temperature wire 6 each adjacent metal sheet 11 is connected in series again, adopt solid brilliant pad 1 that described light emitting diode 5, sheet metal 11 are implemented welding with high temperature wire 6, integral body is directly embedded on the substrate 21 of wall scroll 2 then, promptly is encapsulated on the described wall scroll 2; Said process is exactly the embedded packaged type of COB (Chip on Board) that the utility model adopts.
At the position preparation line of cut 3 that the light emitting diode wall scroll is fit to, effect is that a kind of design goes for various super bright sizes, after wall scroll 2 cuttings, can carry out the splicing of unit length.
Place a large amount of high-performance heat conduction bars (not marking among the figure) behind the described back chase backlight, the light emitting diode 5 that embeds on described high-performance heat conduction bar and the wall scroll 2 contacts, make both contact area maximizations during installation, help light emitting diode and rapidly heat is conducted, improve its radiating efficiency.
Be to combine in the mode of serial or parallel connection between a plurality of wall scrolls 2 by the high temperature wire welding, wall scroll 2 is realized with extraneous being connected by the solid brilliant pad 01 and 02 that is arranged on wall scroll 2 both sides, realizes by the wall scroll on welding high temperature wire and next door and the power supply of outside;
The power supply of the utility model outside relies on constant-current supply to realize, the calculating by to the series connection of light emitting diode series connection and wall scroll calculates and drives needed electric current of entire aphototropism mould and voltage, and the mode by constant current drives.
Referring to Fig. 2, be installed in the solid brilliant pad 1 of wall scroll 2, comprise white oil silk-screen ring 12 and two blocks of foils 11, described white oil silk-screen ring 12 exceeds PCB surface 0.1mm, can not cover inboard pad; The internal diameter of white oil silk-screen ring 12 is 5.5mm, and external diameter is 6.5mm.
The PCB wiring board is selected the single-sided aluminum-base heat sink of 1.20mm thickness for use.
Referring to Fig. 3, the embedded light emitting diode of COB (Chip on Board), its design feature is: the luminescence chip of light emitting diode is directly embedded on the substrate of wall scroll, be connected to the circuit of wall scroll by the backguy that is similar to Chip Packaging, see on the whole, described luminescence chip just has been integrated on the whole wall scroll, has lacked the part of welding than traditional packaged type, so has dispelled the heat and better reliability.
By the direct-light type LED backlight superhigh-brightness liquid crystal display screen that such scheme constitutes, display brightness superelevation and even, rapid heat dissipation, constant current source drives, long service life.
More than show and described ultimate principle of the present utility model, principal character and advantage of the present utility model.The technician of the industry should understand; the utility model is not restricted to the described embodiments; that describes in the foregoing description and the instructions just illustrates principle of the present utility model; the utility model also has various changes and modifications under the prerequisite that does not break away from the utility model spirit and scope, and these changes and improvements all fall in claimed the utility model scope.The claimed scope of the utility model is defined by appending claims and equivalent thereof.
Claims (6)
1. LED-backlit superhigh-brightness liquid crystal display screen, comprise display panels, light guide plate, the wall scroll of light emitting diode and back chase backlight are set, the light beam that light emitting diode sends scatters on the described display panels through described light guide plate, it is characterized in that
Described light emitting diode is arranged to direct-light-type backlight, and integral body was directly embedded on the substrate of a wall scroll after many light emitting diodes adopted series system to connect;
Be packaged with between the wall scroll of light emitting diode and the wall scroll by the high temperature wire welding, described wall scroll closely pastes mutually with back chase backlight, behind the described back chase backlight setting and with the contacted high-performance heat conduction of described light emitting diode bar;
The distance of described light emitting diode and light guide plate is set to 10-20mm.
2. a kind of LED-backlit superhigh-brightness liquid crystal display screen according to claim 1 is characterized in that, offers pilot hole on the substrate of described wall scroll, adopts screw by described pilot hole wall scroll to be screwed on the back chase backlight.
3. a kind of LED-backlit superhigh-brightness liquid crystal display screen according to claim 2 is characterized in that, described wall scroll and back chase backlight are also bonding by heat conductive silica gel.
4. a kind of LED-backlit superhigh-brightness liquid crystal display screen according to claim 1 is characterized in that, described wall scroll is connected by heat conductive silica gel and screw with back chase backlight.
5. according to claim 1 or 4 described a kind of LED-backlit superhigh-brightness liquid crystal display screens, it is characterized in that, solid brilliant pad is set on the described wall scroll, and the solid brilliant pad on its both sides is welded with high temperature wire, and wall scroll is connected with the externally fed source by the solid brilliant pad and the high temperature wire on both sides.
6. a kind of LED-backlit superhigh-brightness liquid crystal display screen according to claim 5 is characterized in that, constant-current driving is adopted in described externally fed source.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201020192939XU CN201749271U (en) | 2010-05-13 | 2010-05-13 | LED (light-emitting diode) backlighting ultra-bright liquid crystal display (LCD) screen |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201020192939XU CN201749271U (en) | 2010-05-13 | 2010-05-13 | LED (light-emitting diode) backlighting ultra-bright liquid crystal display (LCD) screen |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201749271U true CN201749271U (en) | 2011-02-16 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201020192939XU Expired - Fee Related CN201749271U (en) | 2010-05-13 | 2010-05-13 | LED (light-emitting diode) backlighting ultra-bright liquid crystal display (LCD) screen |
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| Country | Link |
|---|---|
| CN (1) | CN201749271U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2013177804A1 (en) * | 2012-05-30 | 2013-12-05 | 深圳市华星光电技术有限公司 | Connecting wire structure of direct-type lamp bar and connecting method thereof |
-
2010
- 2010-05-13 CN CN201020192939XU patent/CN201749271U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2013177804A1 (en) * | 2012-05-30 | 2013-12-05 | 深圳市华星光电技术有限公司 | Connecting wire structure of direct-type lamp bar and connecting method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110216 Termination date: 20110513 |